PixArt / Mbed OS 9125_referenceCode

Reference firmware for PixArt's PAT9125EL sensor and evaluation board. "Hello World" and "Library" contain the exact same files. Please import just one of the two into your mBed compiler as a new program and not as a library.

Welcome to the code repository for PixArt's PAT9125EL sensor and evaluation board.

For general information about this product, please visit this product's components page here:
https://os.mbed.com/components/PAT9125EL-Evaluation-Board/

For guides and tips on how to setup and evaluate the PAT9125EL sensor with the Nordic nRF52-DK microcontroller using this reference code, please visit this guide:
https://os.mbed.com/teams/PixArt/code/9125_referenceCode/wiki/Guide-for-nRF52-DK-Platform

For guides and tips on how to setup and evaluate the PAT9125EL sensor with any microcontroller using this reference code, please visit this guide:
https://os.mbed.com/teams/PixArt/code/9125_referenceCode/wiki/Guide-for-Any-Platform

main.cpp@5:577976dae20d, 2018-07-23 (annotated)

Committer:
PixArtVY
Date:
Mon Jul 23 22:15:42 2018 +0000
Revision:
5:577976dae20d
Parent:
4:8f7d8ff001f8 
Comments.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
PixArtVY 0:e9cce1154246 1 // PAT9125EL: Miniature Optical Navigation Chip reference code.
PixArtVY 5:577976dae20d 2 // Version: 1.2
PixArtVY 5:577976dae20d 3 // Latest Revision Date: 23 July 2018
PixArtVY 0:e9cce1154246 4 // By PixArt Imaging Inc.
PixArtVY 0:e9cce1154246 5 // Primary Engineer: Vincent Yeh (PixArt USA)
PixArtVY 0:e9cce1154246 6
PixArtVY 3:979019410df2 7 // Copyright [2018] [Vincent Yeh]
PixArtVY 3:979019410df2 8 // Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at:
PixArtVY 3:979019410df2 9 // http://www.apache.org/licenses/LICENSE-2.0
PixArtVY 3:979019410df2 10
PixArtVY 3:979019410df2 11
PixArtVY 0:e9cce1154246 12 /*
PixArtVY 0:e9cce1154246 13 //=======================
PixArtVY 0:e9cce1154246 14 //Revision History
PixArtVY 0:e9cce1154246 15 //=======================
PixArtVY 4:8f7d8ff001f8 16 Version 1.2 -- 23 July 2018
PixArtVY 4:8f7d8ff001f8 17 -Changed SPI frequency to 2MHz.
PixArtVY 4:8f7d8ff001f8 18 -Changed SPI timing for the readRegister function.
PixArtVY 4:8f7d8ff001f8 19
PixArtVY 3:979019410df2 20 Version 1.1 -- 18 July 2018
PixArtVY 4:8f7d8ff001f8 21 -Added apache license notice.
PixArtVY 3:979019410df2 22
PixArtVY 0:e9cce1154246 23 Version 1.0 -- 16 Feb. 2018
PixArtVY 4:8f7d8ff001f8 24 -First release.
PixArtVY 0:e9cce1154246 25 */
PixArtVY 0:e9cce1154246 26
PixArtVY 0:e9cce1154246 27 #include "mbed.h"
PixArtVY 0:e9cce1154246 28 #include "registerArrays.h"
PixArtVY 3:979019410df2 29 #include "SPIcommFunctions.h"
PixArtVY 3:979019410df2 30 //#include "I2CcommFunctions.h"
PixArtVY 0:e9cce1154246 31 //Make sure you only have SPIcommFunctions or I2CcommFunctions enabled. You cannot include both headers.
PixArtVY 0:e9cce1154246 32
PixArtVY 0:e9cce1154246 33 int main()
PixArtVY 0:e9cce1154246 34 {
PixArtVY 0:e9cce1154246 35 pc.baud(115200); // Set baud rate to 115200. Remember to sync serial terminal baud rate to the same value.
PixArtVY 0:e9cce1154246 36
PixArtVY 0:e9cce1154246 37 #ifdef SPImode
PixArtVY 0:e9cce1154246 38 spi.format(8,3); // Set SPI to 8 bits with inverted polarity and phase-shifted to second edge.
PixArtVY 4:8f7d8ff001f8 39 spi.frequency(2000000); // Set frequency for SPI communication.
PixArtVY 0:e9cce1154246 40 cs = 1; // Initialize chip select as inactive.
PixArtVY 0:e9cce1154246 41 #endif
PixArtVY 0:e9cce1154246 42
PixArtVY 0:e9cce1154246 43 #ifdef I2Cmode
PixArtVY 0:e9cce1154246 44 i2c.frequency(400000); // Set frequency for I2C communication.
PixArtVY 0:e9cce1154246 45 #endif
PixArtVY 0:e9cce1154246 46
PixArtVY 0:e9cce1154246 47 pc.printf("Program START\n\r");
PixArtVY 0:e9cce1154246 48
PixArtVY 0:e9cce1154246 49 pc.printf("ID Check: %2X\n\r", readRegister(0x00)); //Checks product ID to make sure communication protocol is working properly.
PixArtVY 0:e9cce1154246 50 if(readRegister(0x00) != 0x31)
PixArtVY 0:e9cce1154246 51 {
PixArtVY 0:e9cce1154246 52 pc.printf("Communication protocol error! Terminating program.\n\r");
PixArtVY 0:e9cce1154246 53 return 0;
PixArtVY 0:e9cce1154246 54 }
PixArtVY 0:e9cce1154246 55
PixArtVY 0:e9cce1154246 56 writeRegister(0x06, 0x97); //Software reset (i.e. set bit7 to 1)
PixArtVY 0:e9cce1154246 57 wait_ms(1); //Delay 1 ms for chip reset timing.
PixArtVY 0:e9cce1154246 58 writeRegister(0x06, 0x17); //Ensure software reset is done and chip is no longer in that state.
PixArtVY 0:e9cce1154246 59
PixArtVY 0:e9cce1154246 60 load(initialize, initialize_size); //Load register settings from the "initialize" array
PixArtVY 0:e9cce1154246 61
PixArtVY 0:e9cce1154246 62
PixArtVY 0:e9cce1154246 63
PixArtVY 0:e9cce1154246 64 if(readRegister(0x5E) == 0x04) //These unlisted registers are used for internal recommended settings.
PixArtVY 0:e9cce1154246 65 {
PixArtVY 0:e9cce1154246 66 writeRegister(0x5E, 0x08);
PixArtVY 0:e9cce1154246 67
PixArtVY 0:e9cce1154246 68 if(readRegister(0x5D) == 0x10)
PixArtVY 0:e9cce1154246 69 writeRegister(0x5D, 0x19);
PixArtVY 0:e9cce1154246 70 }
PixArtVY 0:e9cce1154246 71
PixArtVY 2:bebddee7347e 72 writeRegister(0x09, 0x00); // enable write protect.
PixArtVY 0:e9cce1154246 73
PixArtVY 0:e9cce1154246 74 while(1)
PixArtVY 0:e9cce1154246 75 {
PixArtVY 0:e9cce1154246 76 //pc.printf("MOTION bit: %2X\n\r", (readRegister(0x02) & 0x80) >> 7); //Prints motion bit for debugging. 1 = motion detected. 0 = no motion detected.
PixArtVY 0:e9cce1154246 77
PixArtVY 0:e9cce1154246 78 if(readRegister(0x02) & 0x80)
PixArtVY 0:e9cce1154246 79 {
PixArtVY 0:e9cce1154246 80 grabData();
PixArtVY 0:e9cce1154246 81 printData();
PixArtVY 0:e9cce1154246 82 }
PixArtVY 0:e9cce1154246 83 }
PixArtVY 0:e9cce1154246 84 }